1. Laboratory of PhytopathologyWageningen UniversityWageningen6708 PB the Netherlands
2. Laboratory of Cell BiologyWageningen UniversityWageningen6708 PB the Netherlands
3. UMR1345 Institut de Recherche en Horticulture et Semences (IRHS)‐INRA, ACO, Université d'AngersBeaucouzé Cedex49071 France